Turn off Reranking for Streaming Flows (#770)

backend/danswer/background/update.py

@@ -339,6 +339,6 @@ if __name__ == "__main__":
 
     if not MODEL_SERVER_HOST:
         logger.info("Warming up Embedding Model(s)")
-        warm_up_models(indexer_only=True)
+        warm_up_models(indexer_only=True, skip_cross_encoders=True)
     logger.info("Starting Indexing Loop")
     update_loop()

backend/danswer/configs/model_configs.py

@@ -34,7 +34,12 @@ MIN_THREADS_ML_MODELS = int(os.environ.get("MIN_THREADS_ML_MODELS") or 1)
 
 
 # Cross Encoder Settings
+# This following setting is for non-real-time-flows
 SKIP_RERANKING = os.environ.get("SKIP_RERANKING", "").lower() == "true"
+# This one is for real-time (streaming) flows
+ENABLE_RERANKING_REAL_TIME_FLOW = (
+    os.environ.get("ENABLE_RERANKING_REAL_TIME_FLOW", "").lower() == "true"
+)
 # https://www.sbert.net/docs/pretrained-models/ce-msmarco.html
 CROSS_ENCODER_MODEL_ENSEMBLE = [
     "cross-encoder/ms-marco-MiniLM-L-4-v2",

backend/danswer/danswerbot/slack/handlers/handle_message.py

@@ -180,7 +180,6 @@ def handle_message(
                 user=None,
                 db_session=db_session,
                 answer_generation_timeout=answer_generation_timeout,
-                real_time_flow=False,
                 enable_reflexion=reflexion,
                 bypass_acl=bypass_acl,
             )
@@ -205,6 +204,7 @@ def handle_message(
                 query=msg,
                 filters=filters,
                 enable_auto_detect_filters=not disable_auto_detect_filters,
+                real_time=False,
             )
         )
     except Exception as e:

backend/danswer/danswerbot/slack/listener.py

@@ -11,6 +11,7 @@ from sqlalchemy.orm import Session
 
 from danswer.configs.danswerbot_configs import DANSWER_BOT_RESPOND_EVERY_CHANNEL
 from danswer.configs.danswerbot_configs import NOTIFY_SLACKBOT_NO_ANSWER
+from danswer.configs.model_configs import SKIP_RERANKING
 from danswer.danswerbot.slack.config import get_slack_bot_config_for_channel
 from danswer.danswerbot.slack.constants import SLACK_CHANNEL_ID
 from danswer.danswerbot.slack.handlers.handle_feedback import handle_slack_feedback
@@ -295,7 +296,7 @@ def process_slack_event(client: SocketModeClient, req: SocketModeRequest) -> Non
 # without issue.
 if __name__ == "__main__":
     try:
-        warm_up_models()
+        warm_up_models(skip_cross_encoders=SKIP_RERANKING)
 
         socket_client = _get_socket_client()
         socket_client.socket_mode_request_listeners.append(process_slack_event)  # type: ignore

backend/danswer/direct_qa/answer_question.py

@@ -48,7 +48,6 @@ def answer_qa_query(
     db_session: Session,
     disable_generative_answer: bool = DISABLE_GENERATIVE_AI,
     answer_generation_timeout: int = QA_TIMEOUT,
-    real_time_flow: bool = True,
     enable_reflexion: bool = False,
     bypass_acl: bool = False,
     retrieval_metrics_callback: Callable[[RetrievalMetricsContainer], None]
@@ -118,7 +117,7 @@ def answer_qa_query(
 
     try:
         qa_model = get_default_qa_model(
-            timeout=answer_generation_timeout, real_time_flow=real_time_flow
+            timeout=answer_generation_timeout, real_time_flow=question.real_time
         )
     except Exception as e:
         return partial_response(
@@ -159,7 +158,7 @@ def answer_qa_query(
         )
 
     validity = None
-    if not real_time_flow and enable_reflexion and d_answer is not None:
+    if not question.real_time and enable_reflexion and d_answer is not None:
         validity = False
         if d_answer.answer is not None:
             validity = get_answer_validity(query, d_answer.answer)

backend/danswer/main.py

@@ -30,11 +30,11 @@ from danswer.configs.constants import AuthType
 from danswer.configs.model_configs import ASYM_PASSAGE_PREFIX
 from danswer.configs.model_configs import ASYM_QUERY_PREFIX
 from danswer.configs.model_configs import DOCUMENT_ENCODER_MODEL
+from danswer.configs.model_configs import ENABLE_RERANKING_REAL_TIME_FLOW
 from danswer.configs.model_configs import FAST_GEN_AI_MODEL_VERSION
 from danswer.configs.model_configs import GEN_AI_API_ENDPOINT
 from danswer.configs.model_configs import GEN_AI_MODEL_PROVIDER
 from danswer.configs.model_configs import GEN_AI_MODEL_VERSION
-from danswer.configs.model_configs import SKIP_RERANKING
 from danswer.db.credentials import create_initial_public_credential
 from danswer.direct_qa.factory import get_default_qa_model
 from danswer.document_index.factory import get_default_document_index
@@ -186,8 +186,8 @@ def get_application() -> FastAPI:
                 f"Using multilingual flow with languages: {MULTILINGUAL_QUERY_EXPANSION}"
             )
 
-        if SKIP_RERANKING:
-            logger.info("Reranking step of search flow is disabled")
+        if ENABLE_RERANKING_REAL_TIME_FLOW:
+            logger.info("Reranking step of search flow is enabled.")
 
         logger.info(f'Using Embedding model: "{DOCUMENT_ENCODER_MODEL}"')
         if ASYM_QUERY_PREFIX or ASYM_PASSAGE_PREFIX:
@@ -200,7 +200,7 @@ def get_application() -> FastAPI:
             )
         else:
             logger.info("Warming up local NLP models.")
-            warm_up_models()
+            warm_up_models(skip_cross_encoders=not ENABLE_RERANKING_REAL_TIME_FLOW)
 
             if torch.cuda.is_available():
                 logger.info("GPU is available")

backend/danswer/search/models.py

@@ -7,7 +7,7 @@ from danswer.configs.app_configs import DISABLE_LLM_CHUNK_FILTER
 from danswer.configs.app_configs import NUM_RERANKED_RESULTS
 from danswer.configs.app_configs import NUM_RETURNED_HITS
 from danswer.configs.constants import DocumentSource
-from danswer.configs.model_configs import SKIP_RERANKING
+from danswer.configs.model_configs import ENABLE_RERANKING_REAL_TIME_FLOW
 from danswer.indexing.models import DocAwareChunk
 from danswer.indexing.models import IndexChunk
 
@@ -55,7 +55,7 @@ class SearchQuery(BaseModel):
     filters: IndexFilters
     favor_recent: bool
     num_hits: int = NUM_RETURNED_HITS
-    skip_rerank: bool = SKIP_RERANKING
+    skip_rerank: bool = not ENABLE_RERANKING_REAL_TIME_FLOW
     # Only used if not skip_rerank
     num_rerank: int | None = NUM_RERANKED_RESULTS
     skip_llm_chunk_filter: bool = DISABLE_LLM_CHUNK_FILTER

backend/danswer/search/search_nlp_models.py

@@ -21,7 +21,6 @@ from danswer.configs.model_configs import DOCUMENT_ENCODER_MODEL
 from danswer.configs.model_configs import INTENT_MODEL_VERSION
 from danswer.configs.model_configs import NORMALIZE_EMBEDDINGS
 from danswer.configs.model_configs import QUERY_MAX_CONTEXT_SIZE
-from danswer.configs.model_configs import SKIP_RERANKING
 from danswer.utils.logger import setup_logger
 from shared_models.model_server_models import EmbedRequest
 from shared_models.model_server_models import EmbedResponse
@@ -294,7 +293,8 @@ class IntentModel:
 
 
 def warm_up_models(
-    indexer_only: bool = False, skip_cross_encoders: bool = SKIP_RERANKING
+    skip_cross_encoders: bool = False,
+    indexer_only: bool = False,
 ) -> None:
     warm_up_str = (
         "Danswer is amazing! Check out our easy deployment guide at "

backend/danswer/search/search_runner.py

@@ -16,8 +16,10 @@ from danswer.configs.app_configs import NUM_RERANKED_RESULTS
 from danswer.configs.model_configs import ASYM_QUERY_PREFIX
 from danswer.configs.model_configs import CROSS_ENCODER_RANGE_MAX
 from danswer.configs.model_configs import CROSS_ENCODER_RANGE_MIN
+from danswer.configs.model_configs import ENABLE_RERANKING_REAL_TIME_FLOW
 from danswer.configs.model_configs import SIM_SCORE_RANGE_HIGH
 from danswer.configs.model_configs import SIM_SCORE_RANGE_LOW
+from danswer.configs.model_configs import SKIP_RERANKING
 from danswer.db.feedback import create_query_event
 from danswer.db.feedback import update_query_event_retrieved_documents
 from danswer.db.models import User
@@ -392,7 +394,7 @@ def retrieve_chunks(
 
 
 def should_rerank(query: SearchQuery) -> bool:
-    # don't re-rank for keyword search
+    # Don't re-rank for keyword search
     return query.search_type != SearchType.KEYWORD and not query.skip_rerank
 
 
@@ -556,6 +558,8 @@ def danswer_search_generator(
     db_session: Session,
     document_index: DocumentIndex,
     skip_llm_chunk_filter: bool = DISABLE_LLM_CHUNK_FILTER,
+    skip_rerank_realtime: bool = not ENABLE_RERANKING_REAL_TIME_FLOW,
+    skip_rerank_non_realtime: bool = SKIP_RERANKING,
     bypass_acl: bool = False,
     retrieval_metrics_callback: Callable[[RetrievalMetricsContainer], None]
     | None = None,
@@ -563,7 +567,7 @@ def danswer_search_generator(
 ) -> Iterator[list[InferenceChunk] | list[bool] | int]:
     """The main entry point for search. This fetches the relevant documents from Vespa
     based on the provided query (applying permissions / filters), does any specified
-    post-processing, and returns the results. It also create an entry in the query_event table
+    post-processing, and returns the results. It also creates an entry in the query_event table
     for this search event."""
     query_event_id = create_query_event(
         query=question.query,
@@ -583,6 +587,10 @@ def danswer_search_generator(
         access_control_list=user_acl_filters,
     )
 
+    skip_reranking = (
+        skip_rerank_realtime if question.real_time else skip_rerank_non_realtime
+    )
+
     search_query = SearchQuery(
         query=question.query,
         search_type=question.search_type,
@@ -591,6 +599,7 @@ def danswer_search_generator(
         favor_recent=question.favor_recent
         if question.favor_recent is not None
         else False,
+        skip_rerank=skip_reranking,
         skip_llm_chunk_filter=skip_llm_chunk_filter,
     )
 

backend/danswer/server/models.py

@@ -179,6 +179,9 @@ class QuestionRequest(BaseModel):
     search_type: SearchType = SearchType.HYBRID
     enable_auto_detect_filters: bool = True
     favor_recent: bool | None = None
+    # Is this a real-time/streaming call or a question where Danswer can take more time?
+    real_time: bool = True
+    # Pagination purposes, offset is in batches, not by document count
     offset: int | None = None
 
 

backend/tests/regression/answer_quality/eval_direct_qa.py

@@ -84,6 +84,7 @@ def get_answer_for_question(
     question = QuestionRequest(
         query=query,
         filters=filters,
+        real_time=False,
         enable_auto_detect_filters=False,
     )
 
@@ -96,7 +97,6 @@ def get_answer_for_question(
         user=None,
         db_session=db_session,
         answer_generation_timeout=100,
-        real_time_flow=False,
         enable_reflexion=False,
         bypass_acl=True,
         retrieval_metrics_callback=retrieval_metrics.record_metric,

backend/tests/regression/search_quality/eval_search.py

@@ -26,7 +26,7 @@ engine = get_sqlalchemy_engine()
 def redirect_print_to_file(file: TextIO) -> Any:
     original_print = builtins.print
 
-    def new_print(*args, **kwargs):
+    def new_print(*args: Any, **kwargs: Any) -> Any:
         kwargs["file"] = file
         original_print(*args, **kwargs)
 

deployment/docker_compose/docker-compose.dev.yml

@@ -45,7 +45,7 @@ services:
       - SIM_SCORE_RANGE_HIGH=${SIM_SCORE_RANGE_HIGH:-}
       - ASYM_QUERY_PREFIX=${ASYM_QUERY_PREFIX:-}
       - ASYM_PASSAGE_PREFIX=${ASYM_PASSAGE_PREFIX:-}
-      - SKIP_RERANKING=${SKIP_RERANKING:-}
+      - ENABLE_RERANKING_REAL_TIME_FLOW=${ENABLE_RERANKING_REAL_TIME_FLOW:-}
       - QA_PROMPT_OVERRIDE=${QA_PROMPT_OVERRIDE:-}
       - EDIT_KEYWORD_QUERY=${EDIT_KEYWORD_QUERY:-}
       - MULTILINGUAL_QUERY_EXPANSION=${MULTILINGUAL_QUERY_EXPANSION:-}